A genus of small planktonic marine mollusks similar to cliona, also called sea butterflies or sea angels, lacking shells and having wing-like appendages.
Alternative spelling or related genus to 'cliona', both from Greek 'Kleio' (the Muse). These names reflect 19th-century zoologists' poetic approach to scientific nomenclature.
Clione looks like a tiny translucent ghost swimming through the water with little wings—Antarctic explorers were enchanted by them, calling them 'sea angels,' but they're actually predatory hunters.
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